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Factor metaslab_load_wait() in metaslab_load()

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Most callers that need to operate on a loaded metaslab, always
call metaslab_load_wait() before loading the metaslab just in
case someone else is already doing the work.

Factoring metaslab_load_wait() within metaslab_load() makes the
later more robust, as callers won't have to do the load-wait
check explicitly every time they need to load a metaslab.

Reviewed-by: Matt Ahrens <mahrens@delphix.com>
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: Serapheim Dimitropoulos <serapheim@delphix.com>
Closes #8290
This commit is contained in:
Serapheim Dimitropoulos
2019-01-18 11:10:32 -08:00
committed by Brian Behlendorf
parent 960347d3a6
commit b194fab0fb
5 changed files with 53 additions and 55 deletions
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cmd/zdb/zdb.c
+2 -5
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@@ -910,11 +910,8 @@ dump_metaslab(metaslab_t *msp)
if (dump_opt['m'] > 2 && !dump_opt['L']) {
mutex_enter(&msp->ms_lock);
metaslab_load_wait(msp);
if (!msp->ms_loaded) {
VERIFY0(metaslab_load(msp));
range_tree_stat_verify(msp->ms_allocatable);
}
VERIFY0(metaslab_load(msp));
range_tree_stat_verify(msp->ms_allocatable);
dump_metaslab_stats(msp);
metaslab_unload(msp);
mutex_exit(&msp->ms_lock);